CN105443348A - Gas compressor system - Google Patents
Gas compressor system Download PDFInfo
- Publication number
- CN105443348A CN105443348A CN201510979866.6A CN201510979866A CN105443348A CN 105443348 A CN105443348 A CN 105443348A CN 201510979866 A CN201510979866 A CN 201510979866A CN 105443348 A CN105443348 A CN 105443348A
- Authority
- CN
- China
- Prior art keywords
- gas compressor
- guide vane
- inlet guide
- control system
- reflux valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B25/00—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2201/00—Pump parameters
- F04B2201/06—Valve parameters
- F04B2201/0606—Opening width or height
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention provides a gas compressor system. The gas compressor system is characterized by comprising a gas compressor, a control system connected with the gas compressor, and a motoring end connected with the gas compressor system, wherein the gas compressor is provided with an inlet guide vane which is connected with the gas compressor system, a backflow valve which is connected with the gas compressor system, and provided with an exhaust port connected with an intake port of the inlet guide vane, a first-stage compression device which is provided with an intake port connected with an exhaust port of the inlet guide vane, and a second-stage compression device which is provided with an intake port connected with an exhaust port of the first-stage compression device, and provided with an exhaust port connected with an intake port of the backflow valve; and the control system is provided with an inlet guide vane control system used for controlling the inlet guide vane, and a backflow valve control system used for controlling the backflow valve.
Description
Technical field
The present invention relates to field of industrial automatic control, particularly a kind of gas compressor system for controlling gas compressor.
Background technique
Gas compressor is the basic product of the modernization of industry, and that often says electrically and in automation just has entirely pneumatic implication; And gas compressor is just to provide source of the gas power, it is the nucleus equipment of pneumatic system, main body in dynamo-electric bleed air source device, it is the device mechanical energy of former dynamic (normally motor) being converted to gas pressure energy, is the pressure generator of pressurized gas.
Chinese large-sized runs gas compressor continuously, substantially from external package import, and the control system not opening of introduction, difficult in maintenance, once system goes wrong, cannot search and cannot follow the tracks of, impact is produced; And the control system spare part introduced costly, and service fee is high, and one-time investment expense is also high.
Domestic gas compressor is relatively backward in control technique, be all to low power gas compressor substantially, and control accuracy is low, and transient response is slow, easy chaser, and delivery pressure fluctuation is large, and power consumption consumes high, larger to the impulse ratio of transformer and electrical network.
Summary of the invention
The present invention carries out to solve the problem, and it is high, safe and reliable that object is to provide a kind of control accuracy, accurately controls gas compressor aspirated pressure, prevents the gas compressor system that surging phenomenon occurs.
Gas compressor system provided by the invention, has such feature, comprising: gas compressor; Control system, is connected with gas compressor; And monitoring client, be connected with gas compressor system, wherein, gas compressor, has: inlet guide vane, is connected with gas compressor system; Reflux valve, is connected with gas compressor system, and air outlet is connected with the suction port of inlet guide vane; One stage of compression device, suction port is connected with the air outlet of inlet guide vane; And two-stage compression device, suction port is connected with the air outlet of one stage of compression device, and air outlet is connected with the suction port of reflux valve, and control system has: inlet guide vane control system, controls inlet guide vane; And reflux valve control system, control reflux valve.
Gas compressor system provided by the invention, has such feature: wherein, gas compressor, also has: delivery gauge, is connected with the air outlet of two-stage compression device.
Gas compressor system provided by the invention, has such feature: wherein, gas compressor, also has: outlet flow scale, is connected with the air outlet of two-stage compression device.
Gas compressor system provided by the invention, has such feature: wherein, and inlet guide vane adopts traditional PID controller.
Gas compressor system provided by the invention, has such feature: wherein, and the pressure that inlet guide vane is measured according to delivery gauge regulates aperture in real time.
Gas compressor system provided by the invention, has such feature: wherein, and reflux valve adopts two-way close-loop control mode, and aperture adopts two-way height selected control system.
Invention effect
According to gas compressor system involved in the present invention, adopt gas compressor system respectively to such as mouth stator and reflux valve aperture regulate, improve control accuracy and speed of response, the generation of pre-anti-surge can be shifted to an earlier date, reduce machine halt trouble and power consumption, reduce the impact to electrical network simultaneously, improve product working life; The control accuracy of gas compressor and speed of response are reached domestically leading level, breaks the technical monopoly of external minority manufacturer to domestic high power air gas compressor core control technique, solve the present situation that domestic high power air gas compressor control technique falls behind.
Accompanying drawing explanation
Fig. 1 is the system block diagram of the present invention's gas compressor system in an embodiment;
Fig. 2 is the system block diagram of the present invention's inlet guide vane in an embodiment;
Fig. 3 is the system block diagram of the present invention's reflux valve in an embodiment;
Fig. 4 is the type state diagram of the present invention's gas compressor in an embodiment; And
Fig. 5 is the system block diagram of the present invention's control system in an embodiment.
Embodiment
Referring to drawings and Examples, gas compressor system involved in the present invention is explained in detail.
Fig. 1 is the system block diagram of the present invention's gas compressor system in an embodiment.
As shown in Figure 1, gas compressor system has: gas compressor 10, control system 20 and monitoring client 30.
Gas compressor 10 has: inlet guide vane 11, reflux valve 12, one stage of compression device 13, two-stage compression device 14, delivery gauge 15 and outlet flow scale 16.
Control system 20 has: inlet guide vane control unit 21 and reflux valve control unit 22.
Fig. 2 is the system block diagram of the present invention's inlet guide vane in an embodiment.
As shown in Figure 2, inlet guide vane 11 is connected with the inlet guide vane control unit 21 of control system 20.Inlet guide vane 11 adopts traditional PID controller, regulates inlet guide vane aperture in real time according to measuring pressure.
Fig. 3 is the system block diagram of the present invention's reflux valve in an embodiment.
As shown in Figure 3, reflux valve 12 is connected with the reflux valve control unit 22 of control system 20, and the air outlet of reflux valve 12 is connected with the suction port of inlet guide vane 11.The suction port of one stage of compression device 13 is connected with the air outlet of inlet guide vane 11.The suction port of two-stage compression device 14 is connected with the air outlet of one stage of compression device 13, and the air outlet of two-stage compression device 14 is connected with the suction port of reflux valve 12.Delivery gauge 15 is connected with the air outlet of two-stage compression device 14.The pressure that inlet guide vane 11 is measured according to delivery gauge 15 regulates aperture in real time.Outlet flow scale 16 is connected with the air outlet of two-stage compression device 14.
Reflux valve 12 adopts two-way close-loop control mode, aperture adopts two-way height selected control system, wherein PIC controller is that normal SPT+ △ controls, FIC controller is Intelligent flow controller, when actual pressure/flow operating point is away from surge curve, can not there is surge in gas compressor, PIC controller plays control action.When actual pressure/flow operating point is after surge curve D, control system 20 is by gas compressor guide line E preferential interaction, and FIC controller plays a role, and automatically increases reflux valve 12 aperture, make gas compressor 20 away from pumping point, avoid surge in advance and occur.
Control system 20, is connected with gas compressor.Monitoring client 30 is connected with the monitoring control unit 23 of control system 20.
Stress control and Anti-surge Control are the cores of gas compressor, by the cooperation control of entry guide vane 11 and reflux valve 12, both ensure pressure stability, and effectively can avoid again the generation of surge, reach the target of optimal control.
After gas compressor 10 starting condition meets, operator send gas compressor enabled instruction on master station, now control system 20 sends the order of gas compressor high-voltage switch gear excitation combined floodgate, after high tension loop has started, control system 20 controls inlet guide vane 11 and is adjusted to initial opening (5% ~ 17%), and gas compressor 10 works in unloaded state.
When gas compressor 10 to be set as loading working state by operator, reflux valve 12 is closed to 0% gradually from full-gear, and when receiving after reflux valve 12 closes the signal that puts in place, inlet guide vane 11 regulates and transfers system to and automatically regulate.Inlet guide vane 11 regulates aperture according to outlet setting pressure and actual measurement pressure.If actual pressure is less than setting pressure, inlet guide vane 11 is opened gradually, and outlet pressure will constantly increase, until outlet pressure consistent with setting pressure after, inlet guide vane 11 will remain on current aperture; If actual pressure is greater than setting pressure, inlet guide vane 11 will be closed gradually, and outlet pressure will constantly reduce, until outlet pressure consistent with setting pressure after, inlet guide vane 11 will remain on current aperture.
When inlet guide vane 11 remains on certain aperture, when outlet pressure is certain, if customer flow reduces, now need to increase reflux valve 12 aperture, with increase gas compressor 10 by air quantity, otherwise will cause gas compressor 10 that surge occurs.After the Pressure-flow curves of gas compressor 10 is away from surge region, reflux valve 12 needs automatically to cut out, otherwise energy loses in vain in the mode of backflow, and energy consumption waste is serious.
Fig. 4 is the type state diagram of the present invention's gas compressor in an embodiment.
As shown in Figure 4, A/B/C is the delivery pressure of a certain gas compressor when different reflux valve aperture and discharge relation figure respectively, and reflux valve aperture is larger, and straight line is more past to move right; D is surge line and the guide line of gas compressor, and when gas compressor runs, when pressure/flow moves on the left of surge line, gas compressor surge will occur, and this curve is provided by field adjustable by producer; E is the guide line of gas compressor, and PLC is controlled by the cooperation of entry guide vane and reflux valve, ensures that gas compressor operates on the right side of guide line automatically, avoids gas compressor generation surge.
Fig. 5 is the system block diagram of the present invention's control system in an embodiment.
As shown in Figure 5, control system also has: vibration monitoring unit 23, mair motor control unit 24, process control unit 25, lubricating oil system unit 26 and blanket gas protected location 27.
Gas compressor 10 also has compressional axis, mair motor and main compressor.
Vibration monitoring unit 23 is connected with the compressional axis of gas compressor.Air compressor is Continuous Running Equipment, for ensureing device security, axial, the radial magnitude of vibrations of vibration monitoring unit 23 continuous monitoring compressional axis and displacement amplitude.
Mair motor control unit 24 is connected with the mair motor of gas compressor.Mair motor control unit 24 controls the interlock protection of mair motor start and stop and axle temperature, winding temperature.Mair motor control unit 24 can also control the automatic start-stop of mair motor anti-condensation heater.
Process control unit 25 is connected with the main compressor of gas compressor.Process control unit 25 controls the adjustment that pressure sent by main compressor, monitors generation and the protection of anti-surge.
The operation of lubricating oil system unit 26 pairs of gas compressors is most important, has: fuel tank, main oil pump, auxiliary oil pump, oil cooler, oil heater, temperature-detecting device and pressure-detecting device.Whole lubricating oil system unit 26 operates automatically according to controlling functions, does not need manual intervention.
Before activation, first start lubricating oil system unit 26 and ensure that gas compressor 10 each lubricating component lubrication is good, lubricating oil system unit 26 regulates internal oil pressure and oil temperature, to meet system needs to gas compressor 10 simultaneously.
Main oil pump is installed on the core position of gas compressor, by the main shaft Direct driver of gas compressor.Auxiliary oil pump is independently arranged on fuel tank side, chain with the startup of gas compressor, unless auxiliary oil pump enters in gas compressor and reaches predetermined permission in operation and start oil pressure, gas compressor starts, otherwise compressor cannot start.When shutting down,
In this example, predetermined permission starts oil pressure is 0.02MPaG (0.2bar), and the scheduled time is 10 minutes.
Normal oil temperature controls between 38 DEG C ~ 40 DEG C, and when temperature is lower than 38 DEG C, oil heater starts, and when temperature is higher than 40 DEG C, stop oil heater, oil cooler is pneumatic; When oil temperature is lower than 28 DEG C, gas compressor does not allow to start.
Lubricating oil system unit 26 is by monitoring temperature-detecting device and pressure-detecting device, control the operation of gas compressor intelligent control system 20, the generation of gas compressor intelligent control system 20 fault is judged by logical operation, and alarm or emergent stopping gas compressor intelligent control system 20.
Blanket gas protected location 27 prevents lubricant oil from entering gas compressor inside.When generally there is the low warning of blanket gas pressure, gas compressor can not be started; After gas compressor normally runs, because the air pressure of device interior is larger, oil can not be there is and reveal, cancel and interlocking with gas compressor.
Gas compressor intelligent control system 20 is connected with above-mentioned gas compressor intelligent control system 20.
The effect of embodiment and effect
Gas compressor system involved by the present embodiment, adopt gas compressor system respectively to such as mouth stator and reflux valve aperture regulate, improve control accuracy and speed of response, the generation of pre-anti-surge can be shifted to an earlier date, reduce machine halt trouble and power consumption, reduce the impact to electrical network simultaneously, improve product working life; The control accuracy of gas compressor and speed of response are reached domestically leading level, breaks the technical monopoly of external minority manufacturer to domestic high power air gas compressor core control technique, solve the present situation that domestic high power air gas compressor control technique falls behind.
Above-mentioned mode of execution is preferred case of the present invention, is not used for limiting the scope of the invention.
Claims (6)
1. a gas compressor system, is characterized in that, comprising:
Gas compressor;
Control system, is connected with described gas compressor; And
Monitoring client, is connected with described gas compressor system,
Wherein, described gas compressor, has:
Inlet guide vane, is connected with described gas compressor system;
Reflux valve, is connected with described gas compressor system, and air outlet is connected with the suction port of described inlet guide vane;
One stage of compression device, suction port is connected with the air outlet of described inlet guide vane; And
Two-stage compression device, suction port is connected with the air outlet of described one stage of compression device, and air outlet is connected with the suction port of described reflux valve,
Described control system, has:
Inlet guide vane control system, controls described inlet guide vane; And
Reflux valve control system, controls described reflux valve.
2. gas compressor system according to claim 1, is characterized in that:
Wherein, described gas compressor, also has:
Delivery gauge, is connected with the air outlet of described two-stage compression device.
3. gas compressor system according to claim 1, is characterized in that:
Wherein, described gas compressor, also has:
Outlet flow scale, is connected with the air outlet of described two-stage compression device.
4. gas compressor system according to claim 1, is characterized in that:
Wherein, described inlet guide vane adopts traditional PID controller.
5. gas compressor system according to claim 2, is characterized in that:
Wherein, the pressure that described inlet guide vane is measured according to described delivery gauge regulates aperture in real time.
6. gas compressor system according to claim 1, is characterized in that:
Wherein, described reflux valve adopts two-way close-loop control mode, and aperture adopts two-way height selected control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979866.6A CN105443348A (en) | 2015-12-23 | 2015-12-23 | Gas compressor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979866.6A CN105443348A (en) | 2015-12-23 | 2015-12-23 | Gas compressor system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105443348A true CN105443348A (en) | 2016-03-30 |
Family
ID=55553896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510979866.6A Pending CN105443348A (en) | 2015-12-23 | 2015-12-23 | Gas compressor system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105443348A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094188A (en) * | 2019-04-09 | 2019-08-06 | 中国石油集团济柴动力有限公司成都压缩机分公司 | A kind of stepped voltage regulation system and method for supercritical carbon dioxide compressibility |
| CN110878759A (en) * | 2018-09-06 | 2020-03-13 | 新特能源股份有限公司 | Anti-surge control method for high-rotation-speed centrifugal compressor |
| CN111061311A (en) * | 2019-12-18 | 2020-04-24 | 沈阳鼓风机集团自动控制系统工程有限公司 | Method and device for controlling pressure difference between main seal gas and balance pipe in centrifugal compressor |
| CN111379725A (en) * | 2018-12-28 | 2020-07-07 | 新疆八一钢铁股份有限公司 | Centrifugal gas compressor control method |
| CN112682360A (en) * | 2020-12-24 | 2021-04-20 | 钛灵特压缩机无锡有限公司 | Small air-cooled centrifugal air compressor |
| CN114263610A (en) * | 2021-12-29 | 2022-04-01 | 安徽马钢气体科技有限公司 | Control method of Roots blower automatic start-stop system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212051A (en) * | 1996-01-02 | 1999-03-24 | 伍德沃德调控器公司 | Surge prevention control system for dynamic compressors |
| US7094019B1 (en) * | 2004-05-17 | 2006-08-22 | Continuous Control Solutions, Inc. | System and method of surge limit control for turbo compressors |
| US20110280738A1 (en) * | 2010-05-11 | 2011-11-17 | Krishnan Narayanan | Method of surge protection for a dynamic compressor using a surge parameter |
| US20120121376A1 (en) * | 2008-10-07 | 2012-05-17 | Wilhelmus Hermanus Huis In Het Veld | Method of controlling a compressor and apparatus therefor |
| CN103097737A (en) * | 2010-09-09 | 2013-05-08 | 西门子公司 | Method for controlling a compressor |
| CN103867446A (en) * | 2012-12-07 | 2014-06-18 | 三星泰科威株式会社 | Method for anti-surge controlling of multi-stage compressing system |
-
2015
- 2015-12-23 CN CN201510979866.6A patent/CN105443348A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212051A (en) * | 1996-01-02 | 1999-03-24 | 伍德沃德调控器公司 | Surge prevention control system for dynamic compressors |
| US7094019B1 (en) * | 2004-05-17 | 2006-08-22 | Continuous Control Solutions, Inc. | System and method of surge limit control for turbo compressors |
| US20120121376A1 (en) * | 2008-10-07 | 2012-05-17 | Wilhelmus Hermanus Huis In Het Veld | Method of controlling a compressor and apparatus therefor |
| US20110280738A1 (en) * | 2010-05-11 | 2011-11-17 | Krishnan Narayanan | Method of surge protection for a dynamic compressor using a surge parameter |
| CN103097737A (en) * | 2010-09-09 | 2013-05-08 | 西门子公司 | Method for controlling a compressor |
| CN103867446A (en) * | 2012-12-07 | 2014-06-18 | 三星泰科威株式会社 | Method for anti-surge controlling of multi-stage compressing system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110878759A (en) * | 2018-09-06 | 2020-03-13 | 新特能源股份有限公司 | Anti-surge control method for high-rotation-speed centrifugal compressor |
| CN110878759B (en) * | 2018-09-06 | 2021-01-22 | 新特能源股份有限公司 | Anti-surge control method for high-rotation-speed centrifugal compressor |
| CN111379725A (en) * | 2018-12-28 | 2020-07-07 | 新疆八一钢铁股份有限公司 | Centrifugal gas compressor control method |
| CN111379725B (en) * | 2018-12-28 | 2021-06-25 | 新疆八一钢铁股份有限公司 | Centrifugal gas compressor control method |
| CN110094188A (en) * | 2019-04-09 | 2019-08-06 | 中国石油集团济柴动力有限公司成都压缩机分公司 | A kind of stepped voltage regulation system and method for supercritical carbon dioxide compressibility |
| CN110094188B (en) * | 2019-04-09 | 2021-06-01 | 中国石油天然气集团有限公司 | Grading pressure regulating system and method of supercritical carbon dioxide compression system |
| CN111061311A (en) * | 2019-12-18 | 2020-04-24 | 沈阳鼓风机集团自动控制系统工程有限公司 | Method and device for controlling pressure difference between main seal gas and balance pipe in centrifugal compressor |
| CN111061311B (en) * | 2019-12-18 | 2023-07-07 | 沈阳鼓风机集团自动控制系统工程有限公司 | Control method and device for pressure difference between main sealing gas and balance pipe in centrifugal compressor |
| CN112682360A (en) * | 2020-12-24 | 2021-04-20 | 钛灵特压缩机无锡有限公司 | Small air-cooled centrifugal air compressor |
| CN114263610A (en) * | 2021-12-29 | 2022-04-01 | 安徽马钢气体科技有限公司 | Control method of Roots blower automatic start-stop system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105443348A (en) | Gas compressor system | |
| CN101163887B (en) | System and method for controlling a variable speed compressor during stopping | |
| CN101672748B (en) | 400MPa super-high pressure fatigue test device and test method | |
| CN109253101B (en) | One-key starting control method after emergency shutdown and normal shutdown of pipeline compressor by pressure relief | |
| CN105258301A (en) | Air-conditioner and control method and device for compressor in air-conditioner | |
| CN104533767A (en) | Compressor start control method | |
| JP2005133630A (en) | Gas turbine power generation facilities and method for employing the same | |
| EP2877719A1 (en) | System and method of augmenting low oil pressure in an internal combustion engine | |
| CN204152580U (en) | Diesel lubrication low fuel pressure boosting protection alarm system | |
| CN103184928B (en) | Fuel cut-off protection device for turbocharger | |
| CN111486007B (en) | Pneumatic control system of gas turbine | |
| CN204140340U (en) | Gao Long-distance Transmission Pipeline compressor dry gas seals one-level leak recovery system | |
| CN203670257U (en) | Anti-surging control device of centrifugal compressor | |
| CN113882953A (en) | Flexible self-adaptive high-low pressure lubricating oil system for gas turbine generator | |
| RU2411399C1 (en) | Automatic shutdown device of compressor plant at oil pressure reduction in lubrication system of compressor | |
| CN208652139U (en) | Full-automatic gas shield dam fills row's control device | |
| CN112963336A (en) | Control method of water pump | |
| CN211370663U (en) | Oil supply device for compressor equipment | |
| CN204609962U (en) | The lubricating oil station system of a kind of blower fan or steam turbine set | |
| CN217176889U (en) | Two-stage compression oil injection screw nitrogen booster compressor equipment | |
| CN202791271U (en) | Control system for flow-variable oil pump | |
| JP2015218655A (en) | Compressed air supply system | |
| CN203437375U (en) | Vacuum system for direct drive motor of automatic LED (Light Emitting Diode) wafer sorting machine | |
| CN203670237U (en) | Automatic control device of electrically-driven feed pump frequency converting system | |
| CN212337582U (en) | Control device and system for preventing air compressor lubricating oil from emulsifying |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160330 |
|
| RJ01 | Rejection of invention patent application after publication |